*Ahem* OpenGL, anyone?

Now ain't this encouraging and interesting? ;)

Horde3D, a "next-generation graphics engine" for creating 3D-based games, seems promising. Their main focus is on a graphics engine that performs better with multiple characters in view at the same time (in "next-generation quality", highly detailed and shadowed), thus the name "Horde".

http://www.nextgen-engine.net/home.html